Pressure regulator



FIG. 1 is a top and front perspective view of pressure regulator, showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a right side view thereof, the left side view being a mirror image of the right side view shown;

FIG. 5 is a rear view thereof; and,

FIG. 6 is a bottom plan view thereof. 

The ornamental design for pressure regulator, as shown and described. 